Use VI Reference terminals to pass a VI reference you opened as a parameter to another VI. Open VI Reference requires a strictly typed VI reference terminal or constant as a type specifier input when you want a strictly typed reference to a VI. In this case, the value of the reference terminal is unimportant. The function uses only the type.
To configure a VI Reference terminal navigate to the Item tab, click the button next to the Select VI Signature field, and find the VI you want to reference in the Select VI dialog box.